Fig. 6

Percent difference images. Top row depicts the percent difference between the MR-AC maps and the CT-AC for (a) phantom MR-AC, b standard MR-AC, and c NoWall MR-AC. The bottom row depicts the percent difference images between the PET corrected with the different MR-AC approaches and the CT-AC PET: d phantom MR-AC PET, e standard MR-AC PET, and f NoWall MR-AC PET